CN102000493B - Lime slurry atomizing method and device for treating household waste incineration smoke - Google Patents
Lime slurry atomizing method and device for treating household waste incineration smoke Download PDFInfo
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- CN102000493B CN102000493B CN201010586603A CN201010586603A CN102000493B CN 102000493 B CN102000493 B CN 102000493B CN 201010586603 A CN201010586603 A CN 201010586603A CN 201010586603 A CN201010586603 A CN 201010586603A CN 102000493 B CN102000493 B CN 102000493B
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Abstract
The invention relates to a lime slurry atomizing method and device for treating household waste incineration smoke, used for removing acid gaseous pollutants of HCl, SOx and the like in the smoke in the household waste incineration industry and belonging to the field of smoke treatment. A double-fluid atomizing step is adopted, one path of fluid passes through a lime slurry solution and two paths of fluid pass through a water path, water is pumped in a feeding pipe by the pressurization of a pressurizing pump along a tangential direction of an inlet, lime slurry concentrated liquid is dispersed and atomized under the action of pressure and speed after sprayed from an annular narrow hole to obtain fine particles, and a mixture is obtained while the atomization is carried out; and supply of the slurry and the water is regulated through an automatic flow control valve, and on-line regulation is realized according to the quantity of the acid gaseous pollutants and the change of the smoke temperature. For example, a nozzle is blocked, an electromagnet is controlled to be powered on or off through pressure detection, and a needle core is driven by a connecting rod to move up and down along the axial direction for getting through the blockage.
Description
Technical field
The present invention relates to a kind of lime slurry atomization method and device of handling the consumer waste incineration flue gas, be used in acidic gaseous pollutants such as the HCl in the removal flue gas, SOx in the consumer waste incineration industry, belong to the flue gas process field.
Background technology
In the existing technology, in the waste incineration industry, combine the characteristic of Chinese waste component, flue gas is handled should adopt semidry process, and atomizer is the critical component of semi-dry process flue gas desulphurization absorption plant, and atomizer commonly used at present has following three kinds.
1. pressure nozzle
Pressure nozzle mainly is made up of liquid tangential inlet, liquid in rotation chamber, nozzle bore etc., utilizes high-pressure pump to make liquid obtain very high pressure (2-20MPa), gets into the nozzle rotating room from tangential inlet, and liquid obtains in the rotating room to rotatablely move.Pressure nozzle common feature structurally is to make liquid obtain to rotatablely move, and promptly liquid obtains centrifugal intertia force, rotates ejection at a high speed by nozzle bore then.
Pressure atomizer has atomizing power and consumes for a short time, and output is adjustable, reliable, and device structure is simple, can change nozzle form and adapt to dry advantages such as demands of different.But also have following shortcoming: spray orifice is little, is prone to stop up, and will filter well in advance for the dry nebulization material; Prevent that impurity or large granular materials from sneaking into; Material viscosity will be low and spray orifice shower nozzle need easy to wear often change, high-pressure pump manufacturing maintenance is complicated, operation with high pressure hidden danger is many.
2. rotary atomizer
In the time of on absorbing the dish that slurries are sent to rotation at a high speed, because action of centrifugal force absorbs slurries and on the placed side, is stretched to film, and with the border movement of ever-increasing speed to dish.When leaving the edge, be broken up into droplet.When disc spins, also drive ambient air circulation, should reduce the circulating air in the entering dish as far as possible, in case material adheres to behind the dish inner drying, cause that dish is uneven and vibrate.The rotation type atomization nozzle produces droplet size and the uniformity of spraying, and depend primarily on the peripheral speed and the thickness of liquid film of dish, and thickness of liquid film depends on the wetted perimeter of inlet amount, dish and the rotating speed of dish.When the peripheral speed of dish during less than 50m/s, the droplet that obtains is very inhomogeneous; When the peripheral speed of dish is 60m/s, above-mentioned non-uniform phenomenon can not appear just, and therefore, this value is as the minimum of a value of design.When operating usually, the peripheral speed of dish is 90-150m/s.
When feed rate one regularly, obtain uniform droplet, below some is very important: friction when 1) atomizing wheel rotates; 2) rotating speed of atomizing wheel wants high, is generally 7500-25000r/min; 3) the fluid passage surface will process very smoothly; 4) feed liquid evenly distributes on each passage, and charging rate is wanted evenly.
This kind method is not suitable for the atomizing of high-concentration suspension liquid, and atomizer and dynamic power machine cost are high, and maintenance is complicated, will prevent the fault that motor oscillating causes in the running.
3. pneumatic atomizer
Pneumatic atomizer is also claimed air flow type jet nozzle, and this nozzle is the jet-action that utilizes high velocity air, makes liquid obtain fragmentation and atomizing, and atomizing medium can be a steam, also can be compressed air.Steam needs thermal source, in actual engineering, needs to increase quantities.Existing is example description operation principle with the second fluid nozzle, and central tube (being fluid injector) is walked feed liquid, and compressed air is walked annular space (being gas passage or gas nozzle).When the gas-liquid two-phase when end face contacts because from the gas velocity very high (200-340m/s) of annular space ejection, between two fluids, exist very big relative velocity (liquid velocity is no more than 2m/s) and produce very big frictional force and atomize feed liquid.The used compressed-air actuated pressure of nozzle is generally 0.3-0.7MPa.
The air-blast atomization nozzle arrangements is simple, wearing and tearing are little, applied widely, and operating pressure is low, droplet is thin, operating flexibility is big.Energy consuming ratio is bigger but there is compressed air in air flow type jet nozzle, and generally air feed is unstable, is prone to cause the deficiency of wet wall phenomenon.
See that from economy exhaust gas volumn is less than or equal to 200,000 m
3Use the nozzle-type atomizer than rotary atomizer economy, greater than 200,000 m during/h
3Rotary more economical during/h.
Utility model patent ZL03219192.8 discloses a kind of continuous muller with Pneumatic Liquid material atomizer; The discharging opening direction of liquid material passage and the gas outlet direction of gas channel intersect and make liquid material and aerodynamic atomization betide outside the liquid material passage than large space, improved atomizing effect.
Utility model patent ZL02269643.1 forms the protective gas passage through adding a covering at present desulfurization atomizer and pipeline, surrounds the jet expansion slurries, hinders the fouling reaction.
Utility model patent ZL20082015141797.7 has mainly described a kind of anti-blocking striker pin device; At it and feeding mechanism; Link to each other through the active device of active lid between feeding mechanism and the two fluid passages, avoided the obstruction of nozzle, but piston cylinder operator is complicated; Whether processing cost is high, and can not stop up by the on-line monitoring nozzle.
Patent of invention 200510041509.1 is made up of atomizing disk, material separating disc location lid, atomized liquid pipe etc.; Through cold gas import, the air film protection gas source inlet that is provided with; Inside and outside atomizer, formed dynamic air film insulation blocking by the guard block surface; Avoid axle, atomizing disk, material separating disc corrosion, but its cost cost is too high, it is very big influenced by economic condition.
Summary of the invention
In order to overcome the deficiency of prior art structure; The present invention provides a kind of lime slurry atomization method and device of handling the consumer waste incineration flue gas, has solved steam source and has been difficult to obtain, compressed air power consumption and unsettled shortcoming; Adopt water to replace the compressed air lime slurry that atomizes; Thereby realize that atomizing particle is even, be difficult for plug nozzle, save energy.Owing to HCl, SOx generation change with component of refuse and constantly fluctuation, the method can realize the on-line automatic proportioning control of water and lime slurry simultaneously, the automaticity height, and the medicine use amount is few, avoids waste.Like the special circumstances spray nozzle clogging, can make the motion of electromagnet energising drivening rod, thereby make the Piston Compression spring through the feedback information of pressure sensor, the drive nook closing member moves up and down vertically and opens spray nozzle clogging, realizes spraying continuously.
The technical solution adopted for the present invention to solve the technical problems is: a kind of lime slurry atomization method of handling the consumer waste incineration flue gas, adopt the twin step, and one the tunnel walks lime white solution; Two-way is travelled by water, and through the booster pump pressurization water is squeezed into feed tube along the import tangential direction, after annular stricture outlet ejection; Under the effect of pressure and speed; The lime white dope is smashed atomizing, obtains trickle particle diameter particle, forms in the time of atomizing and mixes.The quantity delivered of slurries and water is regulated through the automatic flow control valve door, realizes online adjustment based on the change of acidic gaseous amount of pollutant and flue-gas temperature.As run into spray nozzle clogging, and control the magnet switching electricity through pressure detecting, drive nook closing member by connecting rod and move up and down vertically, get through obstruction.
In addition, if when the direction of motion of hot flue gas and slurries is adverse current, this structure can be avoided the sharp increase of flue gas volume in the tower, makes that the crushing of confined space reduces in the tower, thereby guarantees the normal operation of follow-up air-introduced machine.
Two-way fluid step:
One the tunnel is the lime slurry step: lime slurry gets into second channel through feed pipe after filtering,
Another Lu Weishui step: the water in first water inlet pipe and second water inlet pipe tangentially rotates into first passage under the booster pump pressurization, is used for the lime slurry that atomizes, and forms two-fluid spray nozzle,
The on-line monitoring set-up procedure: through the extracting tower outlet temperature and the acidic gaseous pollutant levels of on-line monitoring, the aperture of regulating flow control valve automatically, the ratio of online adjustment lime slurry and water, thereby the concentration of change atomization slurry;
The slurry spraying step: the water under lime slurry and the booster pump pressurization crosses at spout, because ring exit is narrow, the water speed of ejection is fast; Like this, the relative velocity of water and slurries is bigger, thereby forms bigger frictional force; Make slurries smashed atomizing in the nozzle lower end; This time domain is isolated by moisture film, prevents that flue gas is in contact with it, stopped nozzles;
Stop up the mediation step: monitor internal pressure through the pressure monitoring mouth and increase, the electromagnet energising, drivening rod rotates; Through pressure detecting telescopic spring is pressed onto on the nook closing member, nook closing member opens block part through motion vertically; Realize spraying continuously, at this moment, the pressure monitoring mouth monitors internal pressure and reduces; Electromagnet outage resets nook closing member by the elastic force of spring.
A kind of atomising device of handling the consumer waste incineration flue gas, this atomising device comprise that outer tower body and interior tower body are the inside and outside closing in cone container of an end, and the diameter dimension of interior tower body is less than outer tower body, and the top of interior tower body and outer tower body is connected fixing through the tower body lid; Form first passage between interior tower body and the outer tower body; The middle part of tower body lid connects the center tower body, has nook closing member to pass through in the hole of center tower body, and nook closing member is connected with piston; The periphery of spring housing at nook closing member arranged, the stop portion of other end retaining tower body lower end of spring under the piston at the center; Form second channel between interior tower body and the center tower body, tower body covers the connection feed pipe, and feed pipe is communicated with second channel; Connect first automatic flow control valve on the passage of feed pipe; Connect the 3rd automatic flow control valve on the passage of first water inlet pipe; First water inlet pipe is communicated with first passage; Connect second automatic flow control valve on the passage of second water inlet pipe; Second water inlet pipe becomes 180 degree directions with first water inlet pipe, be communicated with it along the first passage tangential direction.
The external stability of outer tower body connects pole, and an end of pole is through the middle part of axle connection connecting rod, and there is slideway at the connecting rod two ends; One end of connecting rod passes through slideway is connected electromagnet with pulley soup stick, and the other end of connecting rod is connected nook closing member through slideway with pulley.
The invention has the beneficial effects as follows: reduce energy consumption, can the On-line Control concentration of slurry, effectively prevent spray nozzle clogging, it is more even to atomize.
Description of drawings
When combining accompanying drawing to consider; Through with reference to following detailed, can more completely understand the present invention better and learn wherein many attendant advantages easily, but accompanying drawing described herein is used to provide further understanding of the present invention; Constitute a part of the present invention; Illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute to improper qualification of the present invention, wherein:
Fig. 1 is an atomising device structural representation of the present invention.
Fig. 2 is an atomising device structure vertical view of the present invention.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
The specific embodiment
Referring to figs. 1 through Fig. 2 embodiments of the invention are described.
Obviously, many modifications and the variation made based on aim of the present invention of those skilled in the art belongs to protection scope of the present invention.
A kind of atomising device of handling the consumer waste incineration flue gas, this atomising device comprise that feed pipe 2, second channel 4, first water inlet pipe 12, second water inlet pipe 13, first passage 3, first automatic flow control valve 1, second automatic flow control valve 11 and the 3rd automatic flow control valve 14, spout 6, outlet 16, zone 7, pressure monitoring mouth 15, electromagnet 8, connecting rod 9 serve as to support rotation, nook closing member 5 with pole 10;
The external stability of outer tower body 19 connects pole 10, and an end of pole 10 is through the middle part of axle connection connecting rod 9, and an end of connecting rod 9 passes through the soup stick that pulley connects electromagnet 8, and the other end of connecting rod 9 connects nook closing member 5 through pulley.
This atomizer is made up of two-fluid; One the tunnel is that lime slurry gets into second channel 4 through feed pipe 2 after filtering; Two-way is a water, and the water in first water inlet pipe 12 and second water inlet pipe 13 tangentially rotates into first passage 3 under the booster pump pressurization, is used for the lime slurry that atomizes; Form two-fluid spray nozzle; Second automatic flow control valve 14 and the 3rd automatic flow control valve 11 are housed being equipped with on the feed pipe 2 on first automatic flow control valve, 1, the first water inlet pipe 12 and second water inlet pipe 13 respectively, can be according to the extracting tower outlet temperature and the acidic gaseous pollutant levels of on-line monitoring; The ratio of online adjustment lime slurry and water, thereby the concentration of change atomization slurry.The water of lime slurry and booster pump pressurization crosses at spout 6, because ring exit 16 is narrow, the water speed of ejection is fast; Like this, the relative velocity of water and slurries is bigger, thereby forms bigger frictional force; Make slurries smashed atomizing in the nozzle lower end; This time domain 7 is isolated by moisture film, prevents that flue gas is in contact with it, stopped nozzles.Second channel 4 adopts the major diameter nozzle to be difficult for stopping up, if meet special circumstances, nozzle segment stops up, and can monitor internal pressure through pressure monitoring mouth 15 this moment and increase; Electromagnet 8 energisings, drivening rod 9 serve as to support to rotate with pole 10, through pressure detecting telescopic spring are pressed onto on the nook closing member 5, and nook closing member 5 is through motion vertically; Block part is opened, realized spraying continuously, at this moment; Pressure monitoring mouth 15 monitors internal pressure and reduces, and electromagnet 8 outage resets nook closing member 5 by the elastic force of spring.
As stated, embodiments of the invention have been carried out explanation at length, but as long as not breaking away from inventive point of the present invention and effect in fact can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, such variation also all is included within protection scope of the present invention.
Claims (4)
1. lime slurry atomising device of handling the consumer waste incineration flue gas is characterized in that:
Outer tower body and interior tower body are the inside and outside closing in cone container of an end, and the diameter dimension of interior tower body is less than outer tower body, and the top of interior tower body and outer tower body is connected fixing through the tower body lid; Form first passage between interior tower body and the outer tower body; The middle part of tower body lid connects the center tower body, has nook closing member to pass through in the hole of center tower body, and nook closing member is connected with piston; The periphery of spring housing at nook closing member arranged, the stop portion of other end retaining tower body lower end of spring under the piston at the center; Form second channel between interior tower body and the center tower body, tower body covers the connection feed pipe, and feed pipe is communicated with second channel; Connect first automatic flow control valve on the passage of feed pipe; Connect the 3rd automatic flow control valve on the passage of first water inlet pipe; First water inlet pipe is communicated with first passage; Connect second automatic flow control valve on the passage of second water inlet pipe; Second water inlet pipe becomes 180 degree directions with first water inlet pipe, be communicated with it along the first passage tangential direction.
2. a kind of lime slurry atomising device of handling the consumer waste incineration flue gas according to claim 1 is characterized in that the external stability of outer tower body connects pole, and an end of pole is through the middle part of axle connection connecting rod, and there is slideway at the connecting rod two ends; One end of connecting rod passes through slideway is connected electromagnet with pulley soup stick, and the other end of connecting rod is connected nook closing member through slideway with pulley.
3. a lime slurry atomization method of handling the consumer waste incineration flue gas is characterized in that adopting the twin step, and one the tunnel walks lime slurry,
Another Lu Weishui step: the water in first water inlet pipe and second water inlet pipe tangentially rotates into first passage under the booster pump pressurization, is used for the lime slurry that atomizes, and forms two-fluid spray nozzle,
Through the booster pump pressurization water is squeezed into first passage along the import tangential direction, after annular stricture outlet ejection, under the effect of pressure and speed, lime slurry is smashed atomizing, obtain trickle particle diameter particle, form in the time of atomizing and mix; The quantity delivered of slurries and water is regulated through the automatic flow control valve door, realizes online adjustment based on the change of acidic gaseous amount of pollutant and flue-gas temperature; As run into spray nozzle clogging, and through pressure detecting control magnet switching electricity, drivening rod is to support to rotate with the pole, through pressure detecting telescopic spring is pressed onto on the nook closing member, nook closing member moves up and down vertically, gets through obstruction.
4. a kind of lime slurry atomization method of handling the consumer waste incineration flue gas according to claim 3 is characterized in that comprising following steps:
One the tunnel is the lime slurry step: lime slurry gets into second channel through feed pipe after filtering,
The on-line monitoring set-up procedure: through the extracting tower outlet temperature and the acidic gaseous pollutant levels of on-line monitoring, the aperture of regulating flow control valve automatically, the ratio of online adjustment lime slurry and water, thereby the concentration of change atomization slurry;
The slurry spraying step: the water of lime slurry and booster pump pressurization crosses at spout, because ring exit is narrow, the water speed of ejection is fast; Like this, the relative velocity of water and slurries is bigger, thereby forms bigger frictional force; Make slurries smashed atomizing in the nozzle lower end; This time domain is isolated by moisture film, prevents that flue gas is in contact with it, stopped nozzles;
Stop up the mediation step: monitor internal pressure through the pressure monitoring mouth and increase, the electromagnet energising, drivening rod rotates; Through pressure detecting telescopic spring is pressed onto on the nook closing member, nook closing member opens block part through motion vertically; Realize spraying continuously, at this moment, the pressure monitoring mouth monitors internal pressure and reduces; Electromagnet outage resets nook closing member by the elastic force of spring.
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| CN201235325Y (en) * | 2008-07-31 | 2009-05-13 | 上海沃迪科技有限公司 | Airflow type atomizer |
| CN201912888U (en) * | 2010-12-13 | 2011-08-03 | 北京机电院高技术股份有限公司 | Atomization device for treating flue gas caused by incineration of domestic garbage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4762532A (en) * | 1986-03-13 | 1988-08-09 | The Dow Chemical Company | Partial oxidation process using a nozzle for achieving constant mixing energy |
| CN101097061A (en) * | 2007-07-12 | 2008-01-02 | 华东理工大学 | Multi-channel liquid stage fuel partial oxidation generating synthesis gas burner and uses thereof |
| CN201235325Y (en) * | 2008-07-31 | 2009-05-13 | 上海沃迪科技有限公司 | Airflow type atomizer |
| CN201912888U (en) * | 2010-12-13 | 2011-08-03 | 北京机电院高技术股份有限公司 | Atomization device for treating flue gas caused by incineration of domestic garbage |
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Owner name: BMEI CO., LTD. Free format text: FORMER NAME: HIGH TECHNOLOGIES CO., LTD., BEIJING ELECTROMECHANICAL ACADEMY |
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Address after: 100027 Beijing city Chaoyang District Gongti North Road No. 4 Patentee after: BMEI CO., LTD. Address before: 100027 Beijing city Chaoyang District Gongti North Road No. 4 Patentee before: High Technologies Co., Ltd., Beijing Electromechanical Academy |